(New) Worksheet 3

(New) Worksheet 3 - Tom Marler BIOL 108 Worksheet 3 Aug 30...

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Tom Marler BIOL 108 Worksheet 3 Aug. 30, 2009 1. The cardiovascular system consists of _____(1)_______ and the _______(2)______. (1) Pulmonary circuit (2) Systemic circuit 2. What is the purpose of the lymphatic system? _______(3)________. (3) The lymphatic system transports a watery substance called lymph which disburses immune cells (white blood cell) throughout the body during an infection. During an infection white cells blood cells have different roles some engulf the infection other produce antibodies. These immune cells are called lymphocytes which protect the body from antigens. Besides transferring white blood cell the lymphatic system is composed of lymph nodes which are base for white blood. The lymph nodes are located throughout the body in particular spots, the lymph nodes enlarge once a infection is detected. My lymph nodes enlarge whenever I get strep thoart. 3. Identify the 3 types of blood vessels and their function: ____(4)_____. _____(5)______ and _____(6)_____. (4) Arteries- largest and thickest carry oxygenated rich blood away from heart (5) Capillaries- The exchange of carbon dioxide and oxygen take places, they are the smallest (6) Veins- similar to arteries but not as strong they carry blood at low pressure. Veins carry oxygenated rich blood back to the heart. Veins have valves which stop blood from backflow. 4. Explain how the capillary system functions – include its purpose. _____(7)___. (7) Arterioles branch into capillaries which are extremely narrow and their cell wall is composed of endothelium. Which are formed by a single layer of epithelial cells. Networks of capillaries are capillary beds, which are present throughout the body; this makes no cell far from a capillary. In tissues only certain capillaries are opened at one time. Ring of muscle called precapillary
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sphincters control the blood flow through a capillary bed. When a capillary bed is closed the blood moves directly from arterioles to venule through a pathway called an arteriovenous shunt. 5. Identify the chambers of the heart and explain their specific purpose._____(8)_____. (8) The heart has four chambers; the top two chambers are the left and right Atriums. The bottom two chambers are Left and Right ventricle. The right atrium receives deoxygenated blood vena cava and pumps it into the right ventricle. The right ventricle pumps blood into the pulmonary artery. The left atrium receives oxygenated blood from the pulmonary veins and pumps it into the left ventricle. The left ventricle receives the blood from the left atrium which pumps the blood to the aorta which disperses blood throughout the body. 6.
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This note was uploaded on 06/12/2010 for the course ART Art 110 taught by Professor Janebull during the Spring '10 term at Columbia College.

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(New) Worksheet 3 - Tom Marler BIOL 108 Worksheet 3 Aug 30...

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